Optics Express

Nonreciprocal entanglement by dynamically encircling a nexus

Lei Huang, Pengfei Wang, jian zhang, Xin Zhou, Zhang Shuo, Han-Xiao Zhang, Hong Yang, Dong Yan

Published Sep 16, 2026• 0 citations

Abstract

Nonreciprocal entanglement, characterized by inherently robust operation, is a cornerstone for quantum information processing and communications. However, it remains challenging to achieve nonreciprocal entanglement characterized by stability and robustness against environmental fluctuations. Here, we propose a universal nonlinear mechanism to engineer magnetic-free nonreciprocity in dissipative optomechanics by utilizing bistability, a phenomenon ubiquitous across nonlinear physical systems. By dynamically encircling the nexus of bistability, a cusp converged by the bistable surfaces, we obtain nonreciprocal displacement and then utilize it to achieve robust nonreciprocal entanglement. Owing to the unique landscape of bistability, our nonreciprocal displacement and entanglement exhibit stability and robustness through closed-loop operations. Our work presents a foundational framework for leveraging nonlinearity to achieve nonreciprocal quantum information processing. It paves new avenues for exploring nonreciprocal quantum information processing and designing backaction-immune quantum metrology with nonlinearity.

DOI: 10.1364/oe.608324

Related papers

Nonreciprocal microwave–optical entanglement in Kerr-modified cavity optomagnomechanics

Mingyue Liu, Yuan Gong, Jiaojiao Chen +2 more

Abstract Microwave–optical entanglement is essential for efficient quantum communication, secure information transfer, and integrating microwave and optical quantum systems to advance hybrid quantum technologies. In this work, we demonstrate how the magnon Kerr effect can be harnessed to generate and control nonreciprocal entanglement in cavity optomagnomechanics (COMM). This effect induces magnon frequency shifts and introduces pair-magnon interactions, both of which are tunable through the magnetic field direction, enabling nonreciprocal behavior. By adjusting system parameters such as magnon frequency detuning, we show that magnon–phonon, microwave–optical photon–photon, and optical photon–magnon entanglement can be nonreciprocally enhanced and rendered more robust against thermal noise. Additionally, the nonreciprocity of entanglement can be selectively controlled, and ideal nonreciprocal entanglement is achievable. This work paves the way for designing nonreciprocal quantum devices across the microwave and optical regimes, leveraging the unique properties of the magnon Kerr effect in COMM.

arXiv:2412.20030Chinese Physics BFeb 18, 202513 citations

Nonreciprocal Optomechanical Entanglement against Backscattering Losses

Ya‐Feng Jiao, Sheng-Dian Zhang, Yan‐Lei Zhang +3 more

We propose how to achieve nonreciprocal quantum entanglement of light and motion and reveal its counterintuitive robustness against random losses. We find that by splitting the counterpropagating lights of a spinning resonator via the Sagnac effect, photons and phonons can be entangled strongly in a chosen direction but fully uncorrelated in the other. This makes it possible both to realize quantum nonreciprocity even in the absence of any classical nonreciprocity and also to achieve significant entanglement revival against backscattering losses in practical devices. Our work provides a way to protect and engineer quantum resources by utilizing diverse nonreciprocal devices, for building noise-tolerant quantum processors, realizing chiral networks, and backaction-immune quantum sensors.

arXiv:2002.11148Physical Review LettersOct 2, 2020264 citations

Quantum Entanglement Nonlinear Mapping

Jincheng Zhang

Quantum entanglement, a fundamental phenomenon in quantum mechanics, possesses a unique property – non-linearity. This property opens avenues for novel quantum computations, particularly through the manipulation of entangled states. This paper explores the design of a novel quantum entanglement non-linear mapping algorithm, aiming to generate complex quantum states and establish a foundation for quantum information processing. The core mechanism relies on exploiting the inherent non-linearity within entangled states to achieve transformative quantum transformations. We posit that this algorithm represents a significant step towards expanding the capabilities of quantum computation by providing a new method for manipulating and processing quantum information.

Sep 6, 20260 citations

Nonreciprocal entanglement in cavity-magnon optomechanics

Jiaojiao Chen, Xiao‐Gang Fan, Wei Xiong +2 more

Cavity optomechanics, a promising platform to investigate macroscopic quantum effects, has been widely used to study nonreciprocal entanglement with the Sagnac effect. Here, we propose an alternative way to realize nonreciprocal entanglement among magnons, photons, and phonons in a hybrid cavity-magnon optomechanics, where the magnon Kerr effect is used. We show that the Kerr effect gives rise to a magnon frequency shift and an additional two-magnon effect. Both of them can be tuned from positive to negative via tuning the magnetic field direction, leading to nonreciprocity. By tuning system parameters such as magnon frequency detuning or the coefficient of the two-magnon effect, bipartite and tripartite entanglements can be nonreciprocally enhanced. By further studying the defined bidirectional contrast ratio, we find that nonreciprocity in our system can be switched on and off, and can be engineered by the bath temperature. Our proposal not only provides a potential path to demonstrate nonreciprocal entanglement with the magnon Kerr effect, but also opens a direction to engineer and design diverse nonreciprocal devices in hybrid cavity-magnon optomechanics with nonlinear effects.

arXiv:2305.03325Physical review. B./Physical review. BJul 25, 202394 citations

Quantum Entanglement Information Modeling

Jincheng Zhang

Quantum entanglement, a fundamental phenomenon in quantum mechanics, presents a unique challenge and opportunity for information processing. This paper explores the development of a novel computational framework predicated on the intricate properties of quantum entanglement, aiming to leverage this non-classical interaction for enhanced information processing capabilities. The core claim is to establish a robust mathematical model of entangled states, utilizing the inherent non-classical characteristics of entanglement to design a computational paradigm. This approach seeks to overcome limitations inherent in current classical computational paradigms by directly exploiting the potential of entanglement. We delve into the conceptual foundations of this framework, outlining the key mathematical models and computational mechanisms designed to harness the essence of quantum entanglement. This investigation will demonstrate the potential for a paradigm shift in information processing, moving beyond classical approaches.

Sep 6, 20260 citations

Quantum Entanglement-Driven Nonlinear Computation

Jincheng Zhang

Quantum entanglement, a bizarre phenomenon in quantum mechanics, offers a unique pathway to computational power. This paper explores the potential of utilizing entangled quantum states to develop a novel non-linear computational framework. We propose a system predicated on the manipulation of entangled qubits to achieve complex mathematical operations and algorithms, emphasizing its inherent resilience against noise and the potential for fault-tolerant computation. The core claim is that this approach can significantly enhance the efficiency and stability of computation compared to traditional methods. This research focuses on the fundamental principles of entanglement, its application to computational space, and the design of a preliminary computational model leveraging this entanglement.

Sep 4, 20260 citations